66516220717162 has 8 divisors (see below), whose sum is σ = 99774367115076. Its totient is φ = 33258098345472.

The previous prime is 66516220717157. The next prime is 66516220717169. The reversal of 66516220717162 is 26171702261566.

It can be written as a sum of positive squares in 2 ways, for example, as 55013683928641 + 11502536788521 = 7417121^2 + 3391539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66516220717162² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66516220717169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4811178 + ... + 12497194.

Almost surely, 2^{66516220717162} is an apocalyptic number.

66516220717162 is a deficient number, since it is larger than the sum of its proper divisors (33258146397914).

66516220717162 is a wasteful number, since it uses less digits than its factorization.

66516220717162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12013112.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 66516220717162 in words is "sixty-six trillion, five hundred sixteen billion, two hundred twenty million, seven hundred seventeen thousand, one hundred sixty-two".